I have a lumia 630 dual sim ( S.O version is 8.10.12397.895 ) and on the wifi networks list my android wifi hotspot is not listed ( I used a moto X ) so i cant connect it, but i tried to connect a wifi hotspot from a xperia z3 compact and it worked !
I figured it out ! It was the O.S version. To solve this issue I had to sign in and then it was updated, since it is a phone for developement only it had no account set up. Thank you very much!